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Meaning of grass up | Babel Free

Verb CEFR B2

Definitions

To betray by informing on.

UK, slang

Examples

“My sister grassed me up to the caretaker! She thought she was doing me a favour — by grassing me up she was sure he'd let me off.”

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

grasscycle grasscycled grasscycles grasscycling grassed grassed on